Working table for detecting coating leakage of PVDF (Polyvinylidene Fluoride) layer of lithium battery diaphragm

Abstract

The utility model discloses a lithium battery diaphragm PVDF (polyvinylidene fluoride) layer missing coating detection workbench which comprises a main body, a detection cavity is formed in the main body, a detection lamp is mounted on the top end surface in the detection cavity, the bottom of the main body is communicated with the detection cavity, and a glass carrying table is further mounted on the inner side of the bottom of the main body; the supporting columns are mounted at four corners of the bottom end surface of the main body; the detection assembly is composed of a detection part and a mounting part; wherein the mounting part is movably arranged on the supporting column; the designed detection assembly can be matched with an irradiation lamp on an existing conventional detection workbench to achieve irradiation detection of the upper surface and the lower surface, the detection assembly can be transversely adjusted according to the placement position of the PVDF layer, the height of the detection assembly can be adjusted according to the detection requirement, meanwhile, the detection assembly is formed in a modularized mode, and the detection efficiency is improved. The detection assembly can be integrally disassembled and assembled, is very convenient to operate, can be widely applied to various detection workbenches, and has good practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery diaphragm detection, and in particular relates to a workbench for detecting coating leakage of a PVDF layer of a lithium battery diaphragm. Background Art

[0002] In the structure of lithium batteries, the diaphragm is one of the key internal components. The performance of the diaphragm determines the interface structure and internal resistance of the battery, and directly affects the battery's capacity, cycle and safety performance. A diaphragm with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery to prevent the two electrodes from contacting and short-circuiting. In addition, it also has the function of allowing electrolyte ions to pass through. The electrolyte of lithium batteries is usually an organic solvent, such as dimethyl carbonate. These organic solvents have high volatility and corrosiveness, which may affect the safety of the battery. In order to protect the positive and negative electrodes inside the battery from corrosion and damage, a layer of isolation membrane needs to be set inside the battery. PVDF membrane has good chemical stability and mechanical strength, which can effectively prevent electrolyte leakage and short-circuit. In the processing of the PVDF layer, it needs to be tested on the workbench to avoid the phenomenon of PVDF leakage.

[0003] Since the PVDF layer of the lithium battery separator is relatively thin overall, the existing inspection workbench needs to detect the phenomenon of missing coating by irradiating the PVDF layer with a light source from the top or bottom. However, this method still cannot guarantee effective inspection of the PVDF layer. Therefore, in actual application, the inspection pass rate is low and there is room for improvement. Utility Model Content

[0004] The utility model aims to provide a workbench for detecting coating leakage of PVDF layer of lithium battery separator, so as to solve the problem of low qualified rate in the coating leakage detection of PVDF layer in the existing detection workbench proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a workbench for detecting leakage of PVDF layer of lithium battery diaphragm, comprising a main body, a detection cavity is formed inside, a detection lamp is installed on the internal top surface of the detection cavity, and the bottom of the main body is connected with the detection cavity, and a glass carrier is also installed on the inner side of the bottom of the main body; a pillar is installed at the four corners of the bottom end surface of the main body; it also includes a detection assembly, which is composed of a detection part and a mounting part; wherein the mounting part is movably arranged on the pillar; the detection part is movably arranged on the mounting part and moves laterally along the mounting part, and the detection part is directly below the glass carrier, during the detection, the PVDF layer is placed on the top surface of the glass carrier, and then the mounting part is adjusted up and down on the pillar to adjust the height of the entire detection assembly, and then the detection part is slid laterally on the mounting part according to the position of the PVDF layer until it reaches directly below the PVDF layer, at this time, the detection of the upper and lower sides of the PVDF layer is completed by the detection part and the detection lamp on the internal top surface of the main body.

[0006] Preferably, the mounting portion includes two symmetrically arranged connecting rods and a middle plate welded at the middle position of the opposite surfaces of the two connecting rods. A ring is fixed to the end of each connecting rod. The ring is provided with a hole, and a tightening stud is screwed into the hole. The tightening stud is abutted against the support pillar to limit the connecting rod and achieve fixation after the height is completed to avoid downward movement. The detection portion is slidably arranged on the connecting rod.

[0007] Preferably, the detection part includes a movable light frame, one end of which is installed with a movable clamping plate by bolts, and the other end of the movable light frame and the movable clamping plate are half-wrapped on the connecting rod, so as to realize the connection between the mobile light frame and the connecting rod without separation, and also realize the movement of the mobile light frame on the connecting rod, and the separated movable clamping plate can ensure the normal installation of the mobile light frame in the early stage. A groove is provided on the top surface of the mobile light frame, and an irradiation lamp is bonded in the groove or installed by bolts. During the detection, the irradiation lamp is driven to move to the specified position by the mobile light frame, and then the bottom of the PVDF layer is irradiated and detected by the irradiation lamp.

[0008] Preferably, a placement frame is fixed to the bottom end surface of the middle plate, a lithium battery is bonded inside the placement frame, an electric wire is connected between the lithium battery and the irradiation lamp, and the irradiation lamp is powered by the lithium battery.

[0009] Preferably, both sides of the middle of the placement frame extend outward horizontally and form a support plate, which is in the same plane as the bottom end surface of the lithium battery, so that the lithium battery can be placed on the support plate, increasing the placement area and improving the placement stability.

[0010] Preferably, the middle plate and the connecting rod are on the same plane and are both in contact with the bottom end surface of the movable light frame.

[0011] Preferably, the length of the electric wire is greater than the length of the connecting rod, thereby ensuring that the movable light frame moves normally on the connecting rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The designed detection component can cooperate with the irradiation lamp on the existing conventional detection workbench to realize irradiation detection of the upper and lower surfaces, and the detection component can be adjusted laterally according to the position of the PVDF layer, and the height of the detection component can be adjusted according to the detection requirements. At the same time, the detection component is modular in structure and can be disassembled and assembled as a whole, which is very convenient to operate. The detection component can be widely used on various detection workbenches, has good practicality, and improves the shortcomings of existing detection workbenches in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the connection between the detection component and the pillar of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the detection component of the utility model.

[0017] In the figure:

[0018] 100, main body; 101, glass stage; 102, pillar; 103, fastening stud;

[0019] 200, connecting rod; 201, collar; 202, placement frame; 203, middle plate; 204, support plate;

[0020] 300, movable light frame; 301, movable card board; 302, irradiation lamp; 303, electric wire;

[0021] 400. Lithium battery. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 3The utility model provides a technical solution: a workbench for detecting leakage of PVDF layer of lithium battery diaphragm, comprising:

[0024] The main body 100 has a detection cavity formed inside, and a detection lamp is installed on the top surface of the detection cavity. The bottom of the main body 100 is connected with the detection cavity, and a glass stage 101 is also installed on the inner side of the bottom of the main body 100;

[0025] Support pillars 102 are installed at the four corners of the bottom end surface of the main body 100;

[0026] Also includes

[0027] The detection component is composed of a detection part and a mounting part;

[0028] The mounting portion is movably disposed on the support column 102;

[0029] The detection part is movably arranged on the mounting part and moves laterally along the mounting part, and the detection part is directly below the glass carrier 101. During the detection, the PVDF layer is placed on the top surface of the glass carrier 101, and then the mounting part is adjusted up and down on the pillar 102 to adjust the height of the entire detection assembly. Then, according to the position of the PVDF layer, the detection part is slid laterally on the mounting part until it reaches directly below the PVDF layer. At this time, the detection of the upper and lower sides of the PVDF layer is completed through the detection part and the detection light on the top surface inside the main body 100.

[0030] In this embodiment, preferably, the mounting portion includes two symmetrically arranged connecting rods 200, and a middle plate 203 welded at the middle position of the opposite surfaces of the two connecting rods 200, and a ring 201 is fixed at the end of each connecting rod 200, and a hole is opened on the ring 201, and a tightening stud 103 is screwed into the hole, and the tightening stud 103 is abutted against the support 102, thereby completing the limitation of the connecting rod 200 and achieving fixation after the height is completed to avoid downward movement; the detection portion is slidably arranged on the connecting rod 200.

[0031] In this embodiment, preferably, the detection part includes a movable light frame 300, one end of which is installed with an active clamping plate 301 by bolts, and the other end of the movable light frame 300 and the active clamping plate 301 are both half-wrapped on the connecting rod 200, so as to realize the connection between the mobile light frame 300 and the connecting rod 200 without separation, and also realize the movement of the mobile light frame 300 on the connecting rod 200, and the separated active clamping plate 301 can ensure the normal installation of the mobile light frame 300 in the early stage, and a groove is opened on the top surface of the mobile light frame 300, and an irradiation lamp 302 is bonded in the groove or installed by bolts, and during the detection, the irradiation lamp 302 is driven by the mobile light frame 300 to move to the specified position, and then the bottom of the PVDF layer is irradiated and detected by the irradiation lamp 302.

[0032] In this embodiment, preferably, a placement frame 202 is fixed to the bottom end surface of the middle plate 203, and a lithium battery 400 is bonded to the inside of the placement frame 202. An electric wire 303 is connected between the lithium battery 400 and the irradiation lamp 302, and the irradiation lamp 302 is powered by the lithium battery.

[0033] In this embodiment, preferably, both sides of the middle of the placement frame 202 extend horizontally outward and form a support plate 204, which is on the same plane as the bottom end surface of the lithium battery 400. Therefore, the lithium battery 400 can be placed on the support plate 204, increasing the placement area and improving the placement stability.

[0034] In this embodiment, preferably, the middle plate 203 and the connecting rod 200 are on the same plane and both fit with the bottom end surface of the movable light frame 300 .

[0035] In this embodiment, preferably, the length of the electric wire 303 is greater than the length of the connecting rod 200 , so as to ensure that the movable light frame 300 moves normally on the connecting rod 200 .

[0036] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workbench for detecting leakage of PVDF layer of lithium battery separator, comprising: The main body (100) has a detection cavity formed inside, a detection lamp is installed on the top surface of the detection cavity, and the bottom of the main body (100) is connected to the detection cavity. A glass carrier (101) is also installed on the inner side of the bottom of the main body (100); Support columns (102) are installed at the four corners of the bottom end surface of the main body (100); It is characterized in that Also includes The detection component is composed of a detection part and a mounting part; The mounting portion is movably arranged on the support column (102); The detection part is movably arranged on the mounting part and moves laterally along the mounting part, and the detection part is located directly below the glass carrier (101).

2. A workbench for detecting leakage of PVDF layer of lithium battery separator according to claim 1, characterized in that: The mounting portion comprises two symmetrically arranged connecting rods (200) and a middle plate (203) welded to the middle position of the opposite surfaces of the two connecting rods (200); a collar (201) is fixed to the end of each connecting rod (200); a hole is provided on the collar (201), and a tightening stud (103) is screwed into the hole, and the tightening stud (103) abuts against the pillar (102); the detection portion is slidably arranged on the connecting rod (200).

3. A workbench for detecting leakage of PVDF layer of lithium battery separator according to claim 2, characterized in that: The detection unit comprises a movable light frame (300), one end of which is mounted with a movable clamping plate (301) via bolts, the other end of the movable light frame (300) and the movable clamping plate (301) are both half-wrapped on a connecting rod (200), and a groove is provided on the top surface of the movable light frame (300), and an irradiation lamp (302) is bonded in the groove or mounted via bolts.

4. A workbench for detecting leakage of PVDF layer of lithium battery separator according to claim 3, characterized in that: A placement frame (202) is fixed to the bottom end surface of the middle plate (203), a lithium battery (400) is bonded inside the placement frame (202), and an electric wire (303) is connected between the lithium battery (400) and the irradiation lamp (302).

5. A workbench for detecting leakage of PVDF layer of lithium battery separator according to claim 4, characterized in that: Both sides of the middle of the placement frame (202) extend outward horizontally and form a support plate (204), and the support plate (204) and the bottom end surface of the lithium battery (400) are on the same plane.

6. A workbench for detecting leakage of PVDF layer of lithium battery separator according to claim 3, characterized in that: The middle plate (203) and the connecting rod (200) are located on the same plane and are both in contact with the bottom end surface of the movable light frame (300).

7. A workbench for detecting leakage of PVDF layer of lithium battery separator according to claim 4, characterized in that: The length of the electric wire (303) is greater than the length of the connecting rod (200).

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